That being said future printings might buff Wrenn and Six since its potential for being a land recurring threat are high, but for what Modern is now I dont really believe W6 deserves the second place, or to rephrase it: Definitely not in comparison to Shardless Agent
Cards like Rest in Peace or Leyline of the Void put a huge damper on their plans
There are only a few banned cards for MTG Vintage: Chaos Orb Falling Star Shahrazad Besides banned cards, there are also a number of restricted cards in MTG Vintage
Then search your library for up to two basic land cards which have the same name as the chosen land, put them onto the battlefield tapped, then shuffle
One with the Multiverse is imminently more fair, but the bonus of being able to free-cast a spell from your library each turn is nice
It is however, recommended for collection purposes rather than for grading